XForms Input Controls

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The user interface of XForms uses XForms controls.

XForms Controls

The user interface elements in XForms are called XForms Controls.

The most commonly used control elements are <input> and <submit>.

Each control element has a ref attribute pointing back to the XForms data model.

Device Independent Controls

It is important to know that the XForms user interface does not describe exactly how to display the XForms controls.

Because XForms is platform and device independent, XForms leaves it up to the browser to decide how to display the controls.

This way XForms can be used for all types of devices, personal computers, cell phones, hand held computers and much more. XForms is also the perfect solution for defining user interfaces for people with disabilities.

The Input Control

The input control is the most common XForms control. It can hold one line of text:

<input ref="name/fname"><label>First Name</label></input>

Most often the input control will display as an input field, like this:

First Name:

The <label> Element

The <label> element is a mandatory child element for all XForms input controls.

The reason for this is to secure that the form can be used for all types of devices (because labels can be treated in different ways). For voice software the label has to be spoken, and for some hand held computers the label has to follow the input, screen by screen.

The Secret Control

The secret control is designed to input passwords or other hidden information:

<secret ref="name/password"><label>Password:</label></secret>

Most often the secret control will display as an input field like this:


The Textarea Control

The textarea control is used for multi-line input:

<textarea ref="message"><label>Message</label></textarea>

The textarea control might display as an input field like this:


The Submit Control

The submit control is used to submit the data:

<submit submission="form1"><label>Submit</label></submit>

The Trigger Control

The trigger control is used to trigger an action:

<trigger ref="calculate"><label>Calculate!</label></trigger>

The Output Control

The output control is used to display XForms data.

The example below will simply output Content of the <fname> and <lname> node in the XForms XML document (XForms instance):



<output ref="fname"/>
<output ref="lname"/>

The Upload Control

The upload control is designed for uploading files to a server:

<upload bind="name">
  <label>File to upload:</label>
  <filename bind="file"/>
  <mediatype bind="media"/>

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